Install and use SQL Server Upgrade Advisor for that purpose. I recommend downloading the tool rather than using the version on the distribution media since u can then be sure that using the latest edition. Install the tool to a client machine rather than to a production database server. While Upgrade Advisor does not make any changes to your configuration. Start the Upgrade Advisor by going to Start > All Programs > SQL Server 2005 > SQL erver 2005 Upgrade. Rest is here and also see here.